#include "stm32f10x.h"                  // Device header

void AD_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
    
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);
    
    ADC_InitTypeDef ADC_InitStructure;
    ADC_InitStructure.ADC_ContinuousConvMode=DISABLE;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_Init(ADC1,&ADC_InitStructure);
    
    ADC_Cmd(ADC1,ENABLE);
    
    ADC_ResetCalibration(ADC1);
    while(ADC_GetResetCalibrationStatus(ADC1) == SET);
    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1) == SET);    
}

uint16_t AD_GetValue(void)
{
    ADC_SoftwareStartConvCmd(ADC1,ENABLE);
    while(ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC) == RESET );
    return ADC_GetConversionValue(ADC1);
}



